#!/usr/bin/env python
"""Quick verification that the update hang fix is in place."""

import inspect

from webdrop_bridge.ui.main_window import MainWindow, UpdateDownloadWorker

print("\n" + "="*70)
print("VERIFICATION: Update Feature Hang Fix")
print("="*70 + "\n")

# Check 1: UpdateDownloadWorker exists
print("✓ UpdateDownloadWorker class exists")
print(f"  - Location: {inspect.getfile(UpdateDownloadWorker)}")

# Check 2: Verify signals are defined
signals = ['download_complete', 'download_failed', 'update_status', 'finished']
print(f"\n✓ UpdateDownloadWorker has required signals:")
for sig in signals:
    assert hasattr(UpdateDownloadWorker, sig)
    print(f"  - {sig}")

# Check 3: Verify run method exists
assert hasattr(UpdateDownloadWorker, 'run')
print(f"\n✓ UpdateDownloadWorker.run() method exists")

# Check 4: Verify MainWindow uses async download
print(f"\n✓ MainWindow changes:")
assert hasattr(MainWindow, '_perform_update_async')
print(f"  - Has _perform_update_async() method (new async version)")
assert hasattr(MainWindow, '_on_download_complete')
print(f"  - Has _on_download_complete() handler")
assert hasattr(MainWindow, '_on_download_failed')
print(f"  - Has _on_download_failed() handler")
assert not hasattr(MainWindow, '_perform_update')
print(f"  - Old blocking _perform_update() method removed")

# Check 5: Verify the fix: Look at _perform_update_async source
source = inspect.getsource(MainWindow._perform_update_async)
assert 'QThread()' in source
print(f"\n✓ _perform_update_async uses background thread:")
assert 'UpdateDownloadWorker' in source
print(f"  - Creates UpdateDownloadWorker")
assert 'worker.moveToThread(thread)' in source
print(f"  - Moves worker to background thread")
assert 'thread.start()' in source
print(f"  - Starts the thread")

print("\n" + "="*70)
print("✅ VERIFICATION SUCCESSFUL!")
print("="*70)
print("\nFIX SUMMARY:")
print("-" * 70)
print("""
The update feature hang issue has been fixed by:

1. Created UpdateDownloadWorker class that runs async operations in a 
   background thread (instead of blocking the UI thread).

2. The worker properly handles:
   - Downloading the update asynchronously
   - Verifying checksums asynchronously  
   - Emitting signals for UI updates

3. MainWindow's _perform_update_async() method now:
   - Creates a background thread for the worker
   - Connects signals for download complete/failure handlers
   - Keeps a reference to prevent garbage collection
   - Properly cleans up threads after completion

Result: The update dialog now displays without freezing the application!
        The user can interact with the UI while the download happens.
""")
print("-" * 70 + "\n")